4-[3-(4',5'-Difluoro-2'-methoxy-biphenyl-4-yloxymethyl)-piperidine-1-carbonyl]-pyrrolidine-1,3-dicarboxylic acid 1-tert-butyl ester 、
乙酰氯 生成
1-acetyl-4-[3-(4',5'-difluoro-2'-methoxy-biphenyl-4-yloxymethyl)-piperidine-1-carbonyl]-pyrrolidine-3-carboxylic acid